motherboard hp

Hi everyone, Some month ago, one of my friend probably killed my HP Envy 13 (ad-003nf) by causing an electrical overload to one of its USB port. When it happened, the screen turned off immediatly, and the computer never started again. I bought a new computer since, but as it is a 1300e laptop...

My motherboard is already damaged, I tried searching for a replacement on eBay. The CPU of the previous motherboard I have is core i3 and I wanted to upgrade into core i5. I am aware that I should follow the part number of hardware when replacing it but I couldn't find a replacement with the CPU...